RFR 8011805: Update sun.tools.java class file reading/writing support to include the new constant pool entries (including invokedynamic)

[Robert Field]

Currently blocking lambda library pushes.  Internal class reader used by 
rmic does not support new constant pool constant types:

  CONSTANT_METHODHANDLE         = 15;

  CONSTANT_METHODTYPE           = 16;

  CONSTANT_INVOKEDYNAMIC        = 18;


Please review the fix for CR:

      http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8011805

Webrev:

      http://cr.openjdk.java.net/~rfield/8011805/